/*
 * File:		bcrypt.c
 * Author:		Fuang.Cao <cavan.cfa@gmail.com>
 * Created:		2017-05-07 18:17:37
 *
 * Copyright (c) 2017 Fuang.Cao <cavan.cfa@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include <cavan.h>
#include <cavan/bcrypt.h>

#define P_COUNT		NELEM(P_ORIG)
#define S_COUNT		NELEM(S_ORIG)
#define P_SIZE		sizeof(P_ORIG)
#define S_SIZE		sizeof(S_ORIG)

static const uint32_t P_ORIG[] = {
	0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344,
	0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89,
	0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
	0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917,
	0x9216d5d9, 0x8979fb1b
};

static const uint32_t S_ORIG[] = {
	0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7,
	0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99,
	0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16,
	0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e,
	0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee,
	0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
	0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef,
	0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e,
	0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
	0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440,
	0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce,
	0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
	0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e,
	0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677,
	0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
	0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032,
	0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88,
	0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239,
	0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e,
	0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0,
	0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
	0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98,
	0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88,
	0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
	0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6,
	0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d,
	0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
	0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7,
	0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba,
	0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
	0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f,
	0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09,
	0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
	0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb,
	0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279,
	0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
	0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab,
	0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82,
	0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
	0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573,
	0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0,
	0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
	0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790,
	0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8,
	0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
	0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0,
	0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7,
	0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
	0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad,
	0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1,
	0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
	0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9,
	0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477,
	0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
	0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49,
	0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af,
	0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa,
	0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5,
	0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41,
	0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915,
	0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400,
	0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915,
	0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664,
	0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a,
	0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623,
	0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266,
	0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,
	0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e,
	0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6,
	0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1,
	0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e,
	0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1,
	0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737,
	0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8,
	0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff,
	0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd,
	0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701,
	0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7,
	0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41,
	0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331,
	0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf,
	0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af,
	0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e,
	0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87,
	0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c,
	0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2,
	0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16,
	0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd,
	0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b,
	0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509,
	0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e,
	0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3,
	0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f,
	0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a,
	0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4,
	0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960,
	0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66,
	0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28,
	0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802,
	0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84,
	0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510,
	0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf,
	0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14,
	0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e,
	0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50,
	0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7,
	0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8,
	0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281,
	0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99,
	0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696,
	0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128,
	0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73,
	0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0,
	0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0,
	0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105,
	0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250,
	0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3,
	0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285,
	0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00,
	0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061,
	0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb,
	0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e,
	0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735,
	0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc,
	0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9,
	0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340,
	0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20,
	0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7,
	0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934,
	0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068,
	0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af,
	0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840,
	0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45,
	0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504,
	0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a,
	0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb,
	0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee,
	0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6,
	0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42,
	0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b,
	0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2,
	0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb,
	0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527,
	0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b,
	0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33,
	0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c,
	0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3,
	0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc,
	0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17,
	0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564,
	0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b,
	0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115,
	0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922,
	0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728,
	0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0,
	0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e,
	0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37,
	0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d,
	0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804,
	0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b,
	0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3,
	0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb,
	0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d,
	0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c,
	0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350,
	0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9,
	0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a,
	0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe,
	0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d,
	0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc,
	0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f,
	0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61,
	0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2,
	0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9,
	0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2,
	0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c,
	0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e,
	0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633,
	0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10,
	0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169,
	0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52,
	0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027,
	0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5,
	0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62,
	0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634,
	0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76,
	0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24,
	0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc,
	0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4,
	0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c,
	0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837,
	0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0,
	0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b,
	0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe,
	0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
	0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4,
	0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8,
	0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
	0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304,
	0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22,
	0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
	0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6,
	0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9,
	0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
	0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593,
	0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51,
	0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28,
	0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c,
	0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b,
	0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
	0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c,
	0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd,
	0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a,
	0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319,
	0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb,
	0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f,
	0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991,
	0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32,
	0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680,
	0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166,
	0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae,
	0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb,
	0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5,
	0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47,
	0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370,
	0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d,
	0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84,
	0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048,
	0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8,
	0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd,
	0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9,
	0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7,
	0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38,
	0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f,
	0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c,
	0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525,
	0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1,
	0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442,
	0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964,
	0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e,
	0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8,
	0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d,
	0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f,
	0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299,
	0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02,
	0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc,
	0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614,
	0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a,
	0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6,
	0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b,
	0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0,
	0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060,
	0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e,
	0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9,
	0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f,
	0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6
};

// Table for Base64 encoding
static const char base64_code_table[] = {
	'.', '/', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
	'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
	'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h',
	'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
	'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5',
	'6', '7', '8', '9'
};

// Table for Base64 decoding
static const uint8_t base64_value_table[] = {
	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
	-1, -1, -1, -1, -1, -1,  0,  1, 54, 55,
	56, 57, 58, 59, 60, 61, 62, 63, -1, -1,
	-1, -1, -1, -1, -1,  2,  3,  4,  5,  6,
	 7,  8,  9, 10, 11, 12, 13, 14, 15, 16,
	17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
	27, -1, -1, -1, -1, -1, -1, 28, 29, 30,
	31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
	41, 42, 43, 44, 45, 46, 47, 48, 49, 50,
	51, 52, 53, -1, -1, -1, -1, -1
};

/**
 * Encode a char array using bcrypt's slightly-modified base64
 * encoding scheme. Note that this is *not* compatible with
 * the standard MIME-base64 encoding.
 *
 * @param d	the char array to encode
 * @param len	the number of chars to encode
 * @return	base64-encoded char *
 * @exception IllegalArgumentException if the length is invalid
 */
char *bcrypt_encode_base64(const uint8_t *data, size_t length, char *buff, size_t size)
{
	uint8_t c1, c2, c3;
	char *buff_end = buff + size;
	const uint8_t *data_end = data + length;

	while (data < data_end && buff < buff_end) {
		c1 = *data++;
		*buff++ = base64_code_table[c1 >> 2];
		c1 = (c1 & 0x03) << 4;

		if (data < data_end && buff < buff_end) {
			c2 = *data++;
			*buff++ = base64_code_table[c1 | c2 >> 4];
			c2 = (c2 & 0x0f) << 2;
		} else {
			if (buff < buff_end) {
				*buff++ = base64_code_table[c1];
			}

			break;
		}

		if (data < data_end && buff < buff_end) {
			c3 = *data++;
			*buff++ = base64_code_table[c2 | c3 >> 6];
		} else {
			if (buff < buff_end) {
				*buff++ = base64_code_table[c2];
			}

			break;
		}

		if (buff < buff_end) {
			*buff++ = base64_code_table[c3 & 0x3f];
		} else {
			break;
		}
	}

	return buff;
}

uint8_t bcrypt_base64_value(char c)
{
	return base64_value_table[c & 0x7f];
}

/**
 * Decode a char *encoded using bcrypt's base64 scheme to a
 * char array. Note that this is *not* compatible with
 * the standard MIME-base64 encoding.
 * @param s	the char *to decode
 * @param maxolen	the maximum number of chars to decode
 * @return	an array containing the decoded chars
 * @throws IllegalArgumentException if maxolen is invalid
 */
uint8_t *bcrypt_decode_base64(const char *data, size_t length, uint8_t *buff, size_t size)
{
	char c1, c2, c3, c4;
	uint8_t *buff_end = buff + size;
	const char *data_end = data + length;

	while (1) {
		if (data < data_end) {
			c1 = bcrypt_base64_value(*data++);
		} else {
			break;
		}

		if (data < data_end) {
			c2 = bcrypt_base64_value(*data++);
		} else {
			break;
		}

		if (buff < buff_end) {
			*buff++ = c1 << 2 | ((c2 >> 4) & 0x03);
		} else {
			break;
		}

		if (data < data_end) {
			c3 = bcrypt_base64_value(*data++);
		} else {
			break;
		}

		if (buff < buff_end) {
			*buff++ = c2 << 4 | ((c3 >> 2) & 0x0f);
		} else {
			break;
		}

		if (data < data_end) {
			c4 = bcrypt_base64_value(*data++);
		} else {
			break;
		}

		if (buff < buff_end) {
			*buff++ = c3 << 6 | c4;
		} else {
			break;
		}
	}

	return buff;
}

/**
 * Blowfish encipher a single 64-bit block encoded as
 * two 32-bit halves
 * @param lr	an array containing the two 32-bit half blocks
 * @param off	the position in the array of the blocks
 */
static void bcrypt_encipher(const uint32_t *P, const uint32_t *S, uint32_t *lr, int off)
{
	uint32_t l = lr[off] ^ P[0];
	uint32_t r = lr[off + 1];
	uint32_t n;
	int i = 0;

	while (i <= BLOWFISH_NUM_ROUNDS - 2) {
		// Feistel substitution on left word
		n = S[(l >> 24) & 0xff];
		n += S[0x100 | ((l >> 16) & 0xff)];
		n ^= S[0x200 | ((l >> 8) & 0xff)];
		n += S[0x300 | (l & 0xff)];
		r ^= n ^ P[++i];

		// Feistel substitution on right word
		n = S[(r >> 24) & 0xff];
		n += S[0x100 | ((r >> 16) & 0xff)];
		n ^= S[0x200 | ((r >> 8) & 0xff)];
		n += S[0x300 | (r & 0xff)];
		l ^= n ^ P[++i];
	}

	lr[off] = r ^ P[BLOWFISH_NUM_ROUNDS + 1];
	lr[off + 1] = l;
}

/**
 * Cycically extract a word of key material
 * @param data	the char *to extract the data from
 * @param offp	a "pointer" (as a one-entry array) to the
 * current offset into data
 * @return	the next word of material from data
 */
uint32_t bcrypt_build_word(const uint8_t *data, int length, int *offp)
{
	uint32_t word = 0;
	int off = *offp;
	int i;

	for (i = 0; i < 4; i++) {
		word = (word << 8) | data[off];
		off = (off + 1) % length;
	}

	*offp = off;

	return word;
}

/**
 * Key the Blowfish cipher
 * @param key	an array containing the key
 */
static void bcrypt_key(uint32_t *P, uint32_t *S, const uint8_t *key, int klen)
{
	int i;
	int koff = 0;
	uint32_t lr[] = { 0, 0 };

	for (i = 0; i < P_COUNT; i++) {
		P[i] = P[i] ^ bcrypt_build_word(key, klen, &koff);
	}

	for (i = 0; i < P_COUNT; i += 2) {
		bcrypt_encipher(P, S, lr, 0);
		P[i] = lr[0];
		P[i + 1] = lr[1];
	}

	for (i = 0; i < S_COUNT; i += 2) {
		bcrypt_encipher(P, S, lr, 0);
		S[i] = lr[0];
		S[i + 1] = lr[1];
	}
}

/**
 * Perform the "enhanced key schedule" step described by
 * Provos and Mazieres in "A Future-Adaptable Password Scheme"
 * http://www.openbsd.org/papers/bcrypt-paper.ps
 * @param data	salt information
 * @param key	password information
 */
static void bcrypt_ekskey(uint32_t *P, uint32_t *S, const uint8_t *data, int dlen, const uint8_t *key, int klen)
{
	int i;
	int koff = 0, doff = 0;
	uint32_t lr[] = { 0, 0 };

	for (i = 0; i < P_COUNT; i++) {
		P[i] ^= bcrypt_build_word(key, klen, &koff);
	}

	for (i = 0; i < P_COUNT; i += 2) {
		lr[0] ^= bcrypt_build_word(data, dlen, &doff);
		lr[1] ^= bcrypt_build_word(data, dlen, &doff);

		bcrypt_encipher(P, S, lr, 0);

		P[i] = lr[0];
		P[i + 1] = lr[1];
	}

	for (i = 0; i < S_COUNT; i += 2) {
		lr[0] ^= bcrypt_build_word(data, dlen, &doff);
		lr[1] ^= bcrypt_build_word(data, dlen, &doff);

		bcrypt_encipher(P, S, lr, 0);

		S[i] = lr[0];
		S[i + 1] = lr[1];
	}
}

/**
 * Perform the central password hashing step in the
 * bcrypt scheme
 * @param password	the password to hash
 * @param salt	the binary salt to hash with the password
 * @param log_rounds	the binary logarithm of the number
 * of rounds of hashing to apply
 * @param cdata         the plaintext to encrypt
 * @return	an array containing the binary hashed password
 */
uint8_t *bcrypt_crypt_raw(const uint8_t *key, int klen, const uint8_t *salt, int slen, int log_rounds, uint32_t *cdata, int clen, uint8_t *buff, size_t size)
{
	uint8_t *buff_end;
	int rounds, i, j;
	uint32_t *P, *S;

	if (log_rounds < 4 || log_rounds > 30) {
		pr_red_info("Invalid log_rounds: %d", log_rounds);
		return NULL;
	}

	P = malloc(P_SIZE + S_SIZE);
	if (P == NULL) {
		pr_err_info("malloc");
		return NULL;
	}

	S = P + P_COUNT;
	memcpy(P, P_ORIG, P_SIZE);
	memcpy(S, S_ORIG, S_SIZE);

	rounds = 1 << log_rounds;

	bcrypt_ekskey(P, S, salt, slen, key, klen);

	for (i = 0; i != rounds; i++) {
		bcrypt_key(P, S, key, klen);
		bcrypt_key(P, S, salt, slen);
	}

	for (i = 0; i < 64; i++) {
		for (j = 0; j < clen; j += 2) {
			bcrypt_encipher(P, S, cdata, j);
		}
	}

	free(P);
	buff_end = buff + size - 3;

	for (i = 0; i < clen && buff < buff_end; i++) {
		uint32_t value = cdata[i];

		*buff++ = (value >> 24) & 0xff;
		*buff++ = (value >> 16) & 0xff;
		*buff++ = (value >> 8) & 0xff;
		*buff++ = value & 0xff;
	}

	return buff;
}

/**
 * Hash a password using the OpenBSD bcrypt scheme
 * @param password	the password to hash
 * @param salt	the salt to hash with (perhaps generated
 * using BCrypt.gensalt)
 * @return	the hashed password
 */
char *bcrypt_hashpw(const char *key, const char *salt, char *buff, size_t size)
{
	uint32_t bf_crypt_ciphertext[] = {
		0x4f727068, 0x65616e42, 0x65686f6c,
		0x64657253, 0x63727944, 0x6f756274
	};
	uint8_t hashb[sizeof(bf_crypt_ciphertext)];
	uint8_t saltb[BCRYPT_SALT_LEN];
	int slen;
	char *buff_end = buff + size;
	int klen = strlen(key);
	int rounds, off;
	char minor;

	if (salt[0] != '$' || salt[1] != '2') {
		pr_red_info("Invalid salt: %s", salt);
		return NULL;
	}

	if (salt[2] == '$') {
		minor = 0;
		off = 3;
	} else {
		minor = salt[2];
		if (minor != 'a' || salt[3] != '$') {
			pr_red_info("Invalid salt: %s", salt);
			return NULL;
		}

		off = 4;
	}

	// Extract number of rounds
	if (salt[off + 2] > '$') {
		pr_red_info("Invalid salt: %s", salt);
		return NULL;
	}

	rounds = text2ulong2(salt + off, 2, 10);
	if (rounds > 30) {
		pr_red_info("Invalid rounds: %d", rounds);
		return NULL;
	}

	if (minor >= 'a') {
		klen++;
	}

	slen = bcrypt_decode_base64(salt + off + 3, 22, saltb, sizeof(saltb)) - saltb;
	bcrypt_crypt_raw((const uint8_t *) key, klen, (const uint8_t *) saltb, slen, rounds, bf_crypt_ciphertext, NELEM(bf_crypt_ciphertext), hashb, sizeof(hashb));

	*buff++ = '$';
	*buff++ = '2';

	if (minor >= 'a') {
		*buff++ = minor;
	}

	*buff++ = '$';

	if (rounds < 10) {
		*buff++ = '0';
	}

	buff = value2text_unsigned_simple(rounds, buff, buff_end - buff, 10);
	*buff++ = '$';

	buff = bcrypt_encode_base64(saltb, slen, buff, buff_end - buff);
	buff = bcrypt_encode_base64((const uint8_t *) hashb, sizeof(bf_crypt_ciphertext) - 1, buff, buff_end - buff);

	return buff;
}

/**
 * Generate a salt for use with the BCrypt.hashpw() method
 * @param log_rounds	the log2 of the number of rounds of
 * hashing to apply - the work factor therefore increases as
 * 2**log_rounds.
 * @param random		an instance of SecureRandom to use
 * @return	an encoded salt value
 */
char *bcrypt_gensalt(int log_rounds, char *buff, size_t size)
{
	char rnd[BCRYPT_SALT_LEN];
	char *buff_end = buff + size;

	if (log_rounds > 30) {
		pr_red_info("Invalid log_rounds: %d", log_rounds);
		return NULL;
	}

	buff = text_copy(buff, "$2a$");
	if (log_rounds < 10 && buff < buff_end) {
		*buff++ = '0';
	}

	buff = value2text_unsigned_simple(log_rounds, buff, buff_end - buff, 10);
	if (buff < buff_end) {
		*buff++ = '$';
	}

	file_read_urandom(rnd, sizeof(rnd));

	return bcrypt_encode_base64((const uint8_t *) rnd, sizeof(rnd), buff, buff_end - buff);
}

/**
 * Generate a salt for use with the BCrypt.hashpw() method
 * @param log_rounds	the log2 of the number of rounds of
 * hashing to apply - the work factor therefore increases as
 * 2**log_rounds.
 * @return	an encoded salt value
 */
char *bcrypt_gensalt2(int log_rounds, char *buff, size_t size) {
	return bcrypt_gensalt(log_rounds, buff, size);
}

/**
 * Generate a salt for use with the BCrypt.hashpw() method,
 * selecting a reasonable default for the number of hashing
 * rounds to apply
 * @return	an encoded salt value
 */
char *bcrypt_gensalt3(char *buff, size_t size) {
	return bcrypt_gensalt(GENSALT_DEFAULT_LOG2_ROUNDS, buff, size);
}

/**
 * Check that a plaintext password matches a previously hashed
 * one
 * @param plaintext	the plaintext password to verify
 * @param hashed	the previously-hashed password
 * @return	true if the passwords match, false otherwise
 */
bool bcrypt_checkpw(const char *plaintext, const char *hashed)
{
	char buff[64];
	char *buff_end = bcrypt_hashpw(plaintext, hashed, buff, sizeof(buff));

	if (buff_end == NULL) {
		pr_red_info("bcrypt_hashpw");
		return false;
	}

	return memcmp(buff, hashed, buff_end - buff) == 0;
}
